Here ya go.
1.Triple extra boost ports on banshees do just about nothing.Some people may have triple port cylinders that run great,but it not because of the triples.
2.You do not want to have the exhaust as wide as possible,its a give and take thing,the wider you have it the faster you will eat rings,same with the transfers.You need a happy medium for your riding style and mods,and piston style and shape.
3.You want to have space between your exhaust port and transfers,i was told at least 2mm.
4.From what i was told by several builders,and from mcdizzy,you want the transfers that are closer to the exhaust port aimed where they blow mixture straight across the top of the piston,and the other transfers to blow more upward.As well as running good it helps cool the rings. The transfer tunnels need to have a nice radius to them.
5.In most cases the transfers need to open/close up at the same time,so the the port roofs need to be even. I have seen some builders stager the primary and secondarys though.
6.You dont want the transfers and intake polished,the rough surface will aid in breaking up the fuel air more.
7.Making all the holes big is not what makes hp.
8.A good way for a novice like me to check someones work,is to measure from the deck to the port roofs,to see how even or uneven they are. A mm off here or there may not seem like a lot,but with porting it is a lot.
These are about all the porting standards,guidlines that i know